US3806469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst compositions containing vanadium and boron
Assignee: Nippon Steel Chemical and Materials Co Ltd
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Filing: 1972-07-18
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Granted: 1974-04-23
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Expires: 1992-07-18
Abstract
Abstract A NEW CATALYST COMPOSITION USEFUL FOR THE VAPOR PHASE OXIDATION OF NAPHTHALENE TO NAPHTHOQUINONE, HAS BEEN FOUND, SAID CATALYST COMPOSITION COMPRISING SILICON OXIDE, VANADIUM PENTOXIDE AND POTASSIUM SULFATE IN COMBINATION WITH 30 TO 300% BY WEIGHT, BASED ON THE WEIGHT OF THE VANADIUM PENTOXIDE, OF A BORON COMPOUND AS B2O3. THE CHARACTERISTIC FEATURE OF THIS COMPOSITIONS IS TO INCLUDE THE BORON COMPOUND TOGETHER WITH THE SILICON OXIDE. THE TECHNICAL ADVANTAGES OBTAINED THEREBY INCLUDE EXCELLENT SELECTIVITY FOR DESIRED REACTION AND GOOD SERVICE LIFE OVER A LONG RUN OPERATION.
Inventors
- 👤 M Morita
- 👤 K Ohta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:56
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/02; B01J27/053; B01J27/055; C; C07; C07C; C07C46/00; C07C46/02; C07C46/04
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-22 | 1977-10-22 | 1978-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-22 | 1981-10-22 | 1982-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-22 | 1985-10-22 | 1986-04-23 | $7700.00 | Window Closed / Lapsed |